one height issue I have noticed is that Pss Marie is at least 1/2 head shorter than Cpss Mary, who seems to be almost Freds height when in heels. On the other hand on their visit to iceland earlier this year someone made a comment how "small" she was, so it's kind of confusing!

12 inches = 1 foot.
1 inch = 2.54cm.
All these guys are short. Seldom more than 1.70m with their sandals.
Both Sheikh Hamdan & Sheikh Rashid are no more than 5ft 5, 1.65m with Hamdan possible an inch taller than Rashid.